It seems like we will get to see Hideo Kojima's, and his studio Kojima productions', next title during The Game Awards next week. Kojima just shared a tweet that only says he is about to "Start a new journey" with an included image of three logos.
This tweet was replied to by the official account of The Game Awards with a siren/alarm emoji, and the host Geoff Keighley also responded, likely to tease and build hype for the event. Kojima Productions is currently working on Death Stranding 2 and an unknown Xbox game, which is supposedly cloud based, possibly also on other projects.
Kojima writing "a new journey" could imply there is is a new Death Stranding journey coming, or that is simply is a brand new franchise, which probably means the Xbox title. We don't know which though - and it could be something completely different - but it doesn't seem like we will have to wait long for the answer.